WO2022118847A1 - コモンモードフィルタ回路 - Google Patents
コモンモードフィルタ回路 Download PDFInfo
- Publication number
- WO2022118847A1 WO2022118847A1 PCT/JP2021/043898 JP2021043898W WO2022118847A1 WO 2022118847 A1 WO2022118847 A1 WO 2022118847A1 JP 2021043898 W JP2021043898 W JP 2021043898W WO 2022118847 A1 WO2022118847 A1 WO 2022118847A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- common mode
- inverter
- phase
- transformers
- capacitors
- Prior art date
Links
- 238000004804 winding Methods 0.000 claims abstract description 124
- 239000003990 capacitor Substances 0.000 claims abstract description 61
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000002238 attenuated effect Effects 0.000 description 4
- 239000004020 conductor Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/0115—Frequency selective two-port networks comprising only inductors and capacitors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/123—Suppression of common mode voltage or current
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
Definitions
- This disclosure relates to a common mode filter circuit.
- the above techniques have some effect in reducing the common mode current, but the effect of reducing the common mode voltage, which causes the bearing failure of the AC motor, is insufficient. Therefore, in the above techniques, the effect of noise suppression is limited.
- the present disclosure explains that a common mode filter circuit capable of reducing a common mode voltage is provided.
- One aspect of the present disclosure is an inverter equipped with a pair of input terminals connected to a power source and three output terminals for outputting three-phase alternating current, and a three-phase alternating current electric motor to which three-phase alternating current is supplied from the output terminal of the transformer. It is a common mode filter circuit connected between and three common mode transformers that cancel out the common mode voltage of three-phase alternating current, and three pairs of capacitors connected to the input terminals of the common mode transformer and the inverter, respectively. One end of each primary winding of the three common mode transformers is connected to each of the three output terminals of the inverter, and the other end of each primary winding of the three common mode transformers is a pair of inverters.
- each pair of capacitors with one end connected to one of the input terminals of the Three of the three common-mode transformers, each connected to the other end of the pair of capacitors and each of the three-phase secondary windings of the three common-mode transformers connected in series with each other and connected in series with each other.
- Each end of each phase secondary winding is connected to each of the three output terminals of the inverter, and the other end of each of the three phase secondary windings of the three common mode transformers connected in series with each other.
- It is a common mode filter circuit connected to a three-phase AC electric machine, and the ratio of the number of turns of the primary winding of each of the three common mode transformers to the number of turns of the secondary winding is 3: 1.
- the common mode voltage can be reduced.
- FIG. 1 It is a figure which shows the common mode filter circuit which concerns on embodiment. It is a perspective view which shows the common mode transformer of FIG. (A) is a graph showing the AC voltage for one phase supplied from the inverter when there is no common mode filter circuit, and (B) is the one phase component supplied from the inverter when the common mode choke coil is installed. (C) is a graph showing the common mode voltage when the common mode filter circuit according to the embodiment is installed, and (D) is a graph showing the case where the voltage axis of (C) is expanded. It is a graph which shows the common mode voltage of.
- One aspect of the present disclosure is an inverter equipped with a pair of input terminals connected to a power source and three output terminals for outputting three-phase alternating current, and a three-phase alternating current electric motor to which three-phase alternating current is supplied from the output terminal of the transformer. It is a common mode filter circuit connected between and three common mode transformers that cancel out the common mode voltage of three-phase alternating current, and three pairs of capacitors connected to the input terminals of the common mode transformer and the inverter, respectively. One end of each primary winding of the three common mode transformers is connected to each of the three output terminals of the inverter, and the other end of each primary winding of the three common mode transformers is a pair of inverters.
- each pair of capacitors with one end connected to one of the input terminals of the Three of the three common-mode transformers, each connected to the other end of the pair of capacitors and each of the three-phase secondary windings of the three common-mode transformers connected in series with each other and connected in series with each other.
- Each end of each phase secondary winding is connected to each of the three output terminals of the inverter, and the other end of each of the three phase secondary windings of the three common mode transformers connected in series with each other.
- It is a common mode filter circuit connected to a three-phase AC electric machine, and the ratio of the number of turns of the primary winding of each of the three common mode transformers to the number of turns of the secondary winding is 3: 1.
- an inverter equipped with a pair of input terminals connected to a power supply and three output terminals for outputting three-phase alternating current, and a three-phase alternating current motor to which three-phase alternating current is supplied from the output terminals of the inverter.
- a common mode filter circuit connected between the two is provided.
- the common mode filter circuit includes three common mode transformers that cancel the common mode voltage of three-phase alternating current, and three pairs of capacitors connected to the common mode transformer and the input terminal of the inverter.
- One end of the primary winding of each of the three common mode transformers is connected to each of the three output terminals of the inverter.
- the other end of the primary winding of each of the three common mode transformers is the other end of one of each pair of capacitors in the three pairs of capacitors with one end connected to one of the pair of input terminals of the inverter and the other end of the inverter. It is connected to the other end of each pair of capacitors in a pair of capacitors having one end connected to the other of the pair of input terminals.
- Each of the three phase secondary windings of the three common mode transformers is connected in series with each other.
- Each end of each of the three phase secondary windings of the three common mode transformers connected in series with each other is connected to each of the three output terminals of the inverter.
- the other ends of each of the three-phase secondary windings of the three common-mode transformers connected in series with each other are connected to a three-phase AC motor.
- the primary winding is phase by phase
- the secondary winding is three phases together
- the ratio of the number of turns of the primary winding to the number of turns of the secondary winding is 3. Since it is 1, the common mode voltage is appropriately offset from the voltage of each phase. As a result, the common mode voltage can be reduced.
- the number of turns of the primary winding of each of the three common mode transformers may be 3, and the number of turns of the secondary winding of each of the three common mode transformers may be 1.
- the number of turns of the primary winding of each of the three common mode transformers is 3, and the number of turns of the secondary winding of each of the three common mode transformers is 1, so that the secondary winding is thick.
- the number of wire turns can be minimized. Since the current flowing through the primary winding is small, the primary winding can be made thin, and since the number of turns is 3, it occupies only a small space. Therefore, the common mode transformer can be significantly miniaturized.
- the primary winding of each of the three common mode transformers is wound three times by passing through the inside and outside of the annular core of the common mode transformer, and the secondary winding of each of the three common mode transformers is. It may be wound once by passing inside the annular iron core of each of the three common mode transformers only once.
- the primary winding since the current flowing through the primary winding is small, the primary winding can be made thin, and the primary winding is wound three times by passing through the inside and outside of the annular iron core of the common mode transformer. Occupies only a small space. Further, since the secondary winding of each of the three common mode transformers is wound once by passing through the inside of the annular iron core of each of the three common mode transformers only once, the secondary winding of the secondary winding. It is easy to increase the space factor and it is easy to miniaturize. Therefore, the common mode transformer can be significantly miniaturized.
- the common mode filter circuit 10 of the present embodiment has a pair of input terminals 30a and 30b connected to the power supply 20 and three output terminals 30u, 30v and 30w for outputting three-phase alternating current. It is connected between the provided inverter 30 and the three-phase alternating current electric motor 40 to which three-phase alternating current is supplied from the output terminals 30u, 30v, 30w of the inverter 30 via the motor cable 50.
- the power supply 20 is a DC power supply such as a battery and a converter.
- the inverter 30 is, for example, a voltage type PWM inverter.
- the inverter 30 converts the DC voltage supplied from the power supply 20 via the input terminals 30a and 30b into a three-phase AC voltage by the switching operation of the power semiconductor element (IGBT, SiC, etc.), and the output terminals 30u, 30v, A three-phase AC voltage is output from 30w.
- the AC voltage converted by the inverter 30 is supplied to the three-phase AC electric motor 40 via the common mode filter circuit 10 and the motor cable 50.
- the frame of the three-phase AC motor 40 is connected to the installation voltage via a ground wire.
- the common mode filter circuit 10 is connected to three common mode transformers 61, 62, 63 that cancel the common mode voltage of three-phase alternating current, and to the common mode transformers 61, 62, 63 and the input terminals 30a, 30b of the inverter 30, respectively. It is equipped with three pairs of capacitors 71, 72, 73, 74, 75, 76.
- the common mode transformer 61 has a one-phase primary winding 61t and a three-phase secondary winding 61u, 61v, 61w.
- the common mode transformer 62 has a one-phase primary winding 62t and a three-phase secondary winding 62u, 62v, 62w.
- the common mode transformer 63 has a one-phase primary winding 63t and a three-phase secondary winding 63u, 63v, 63w.
- One ends 61a, 62a, 63a of the primary windings 61t, 62t, 63t of the three common mode transformers 61, 62, 63, respectively, are connected to each of the three output terminals 30u, 30v, 30w of the inverter 30. That is, one end 61a of the primary winding 61t of the common mode transformer 61 is connected to the three-phase U-phase output terminal 30u of the inverter 30. One end 62a of the primary winding 62t of the common mode transformer 62 is connected to the output terminal 30v of the three-phase V phase of the inverter 30. One end 63a of the primary winding 63t of the common mode transformer 63 is connected to the three-phase W-phase output terminal 30w of the inverter 30.
- the other ends 61b, 62b, 63b of the primary windings 61t, 62t, 63t of the three common mode transformers 61, 62, 63, respectively, are connected to the other ends 71b, 73b, 75b of the capacitors 71, 73, 75. ..
- the capacitors 71, 73, 75 are one of a pair of capacitors 71, 72, a capacitor 73, 74, and a capacitor 75, 76, respectively, among the three pairs of capacitors 71, 72, 73, 74, 75, 76.
- One ends 71a, 73a, 75a of the capacitors 71, 73, 75 are connected to the input terminal 30b, which is one of the pair of input terminals 30a, 30b of the inverter 30.
- the other ends 61b, 62b, 63b of the primary windings 61t, 62t, 63t of the three common mode transformers 61, 62, 63, respectively, are connected to the other ends 72b, 74b, 76b of the capacitors 72, 74, 76. ..
- the capacitors 72, 74, 76 are the other of the pair of capacitors 71, 72, the capacitors 73, 74 and the capacitors 75, 76, respectively, among the three pairs of capacitors 71, 72, 73, 74, 75, 76.
- One ends 72a, 74a, 76a of the capacitors 72, 74, 76 are connected to the input terminal 30a, which is the other end of the pair of input terminals 30a, 30b of the inverter 30.
- the other end 61b of the primary winding 61t of the common mode transformer 61 connected to the U phase of the inverter 30 is the other end 71b of the capacitor 71 to which one end 71a is connected to one input terminal 30a of the inverter 30 and the inverter.
- One end 72a is connected to the other end 72b of the capacitor 72 connected to the other input terminal 30b of 30.
- the other end 62b of the primary winding 62t of the common mode transformer 62 connected to the V phase of the inverter 30 is the other end 73b of the capacitor 73 to which one end 73a is connected to one input terminal 30a of the inverter 30 and the other end 73b of the inverter 30.
- One end 74a is connected to the other end 74b of the capacitor 74 connected to the other input terminal 30b.
- the other end 63b of the primary winding 63t of the common mode transformer 63 connected to the W phase of the inverter 30 is the other end 75b of the capacitor 75 to which one end 75a is connected to one input terminal 30a of the inverter 30 and the other end 75b of the inverter 30.
- One end 76a is connected to the other end 76b of the capacitor 76 connected to the other input terminal 30b.
- the primary windings 61t, 62t, 63t and the capacitors 71, 72, 73, 74, 75, 76 constitute a filter for detecting the U-phase, V-phase, and W-phase common mode voltages.
- Each of the three-phase secondary windings 61u, 61v, 61w, 62u, 62v, 62w, 63u, 63v, 63w of the three common mode transformers 61, 62, 63 are connected in series with each other.
- the 64 wb is connected to each phase of the three-phase AC motor 40 via the motor cable 50.
- one end 64ua of the U-phase secondary windings 61u, 62u, 63u of the common mode transformers 61, 62, 63 connected in series with each other is connected to the U-phase output terminal 30u of the inverter 30, and the other end.
- 64 ub is connected to the U phase of the three-phase AC motor 40.
- One end 64va of the V-phase secondary windings 61v, 62v, 63v of the common mode transformers 61, 62, 63 connected in series with each other is connected to the V-phase output terminal 30v of the inverter 30, and the other end 64vb is connected. It is connected to the V phase of the three-phase AC motor 40.
- One end 64wa of the W phase secondary windings 61w, 62w, 63w of the common mode transformers 61, 62, 63 connected in series to each other is connected to the W phase output terminal 30w of the inverter 30, and the other end 64wb is connected. It is connected to the W phase of the three-phase AC motor 40.
- the ratio of is 3: 1.
- the number of turns of the primary windings 61t, 62t, 63t of the three common mode transformers 61, 62, 63 is 3, and the secondary windings of the three common mode transformers 61, 62, 63, respectively.
- the number of turns of the wires 61u, 61v, 61w, 62u, 62v, 62w, 63u, 63v, 63w is 1 (only passes through the inside of the iron core 65 described later).
- FIG. 2 shows a common mode transformer 61 as a representative of the three common mode transformers 61, 62, 63, but the same applies to the other common mode transformers 62, 63 in the following description.
- the primary windings 61t, 62t, 63t of the three common mode transformers 61, 62, 63, respectively, are wound three times by passing through the inner 65i and the outer 65o of the annular iron core of the common mode transformer. Since a current of only about 1 to 2 A flows through the primary windings 61t, 62t, 63t on the side of the capacitors 71, 72, 73, 74, 75, 76, for example, the conductor cross-sectional area of the primary windings 61t, 62t, 63t. Is very small.
- a copper tape having a thickness of 30 to 40 ⁇ m and a width of about 2 to 4 mm can be applied.
- the secondary windings 61u, 61v, 61w, 62u, 62v, 62w, 63u, 63v, 63w of the three common mode transformers 61, 62, 63, respectively, are the annular rings of the three common mode transformers 61, 62, 63, respectively. It is wound once by passing through the inner side 65i of the iron core 65 only once. That is, the U-phase secondary windings 61u, 62u, 63u connected in series with each other and integrated, and the V-phase secondary windings 61v, 62v, 63v connected in series with each other and integrated with each other are connected in series with each other.
- the integrated W-phase secondary windings 61w, 62w, 63w penetrate the inner 65i of the iron cores 65 of the three common mode transformers 61, 62, 63, respectively.
- the common mode filter circuit 10 of the present embodiment will be described.
- electromagnetic noise countermeasures in which a noise filter is installed between the power supply and the inverter have been proposed.
- the noise filter on the power supply side bypasses the common mode current.
- the common mode current is confined between the inverter and the motor to prevent the common mode current from flowing out to the power supply side.
- This configuration can be realized with a small common mode inductor and a ground capacitor (Y capacitor).
- the common mode voltage cannot be attenuated, and the common mode current on the motor side increases.
- the shaft voltage that causes radiation noise due to the common mode current on the motor side and electrolytic corrosion of the bearing of the bearing of the motor cannot be reduced.
- such a noise filter on the power supply side cannot reduce the mixing of electromagnetic noise into the control circuits of the current sensor, the angle sensor, and the inverter.
- Patent Document 1 it has been proposed to take measures against electromagnetic noise by installing a noise filter between the inverter and the motor. Further, as such a noise filter on the motor side, a configuration for suppressing the common mode voltage itself, which is a cause of electromagnetic noise, has been proposed. In such a configuration, the common mode currents on both the power supply side and the motor side are attenuated. Therefore, in such a configuration, it is possible to reduce the radiation noise due to the common mode current on the motor side and the shaft voltage that causes electrolytic corrosion of the bearing of the bearing of the motor, which is a problem in the noise filter on the power supply side.
- a configuration has been proposed in which a differential mode inductor and a common mode inductor are installed between the inverter and the motor.
- a differential mode capacitor is connected to each phase connection to the motor, and the other end of the filter capacitor, one end of which is connected to the input terminal of the inverter, is connected to each of the differential mode capacitors.
- the differential mode inductor and the differential mode capacitor make up the sinusoidal filter.
- the common mode inductor, differential mode capacitor and filter capacitor form the common mode filter.
- the differential mode inductor is very large. Since the common mode inductor also requires several turns, it becomes large.
- a configuration in which a small non-zero-phase choke is connected to the output of each phase of the inverter has been proposed.
- the non-zero phase choke is connected to the primary winding of the common mode transformer and the output of each phase of the inverter is connected to the secondary winding of the common mode transformer.
- the non-zero phase choke detects the common mode voltage and the common mode transformer attenuates the common mode voltage.
- the common mode transformer requires several turns in order to secure the excitation inductance, so that the size is increased.
- the common mode inductor and the common mode transformer require at least several turns. Therefore, the conventional noise filter is not suitable for a large current inverter having a large conductor cross section.
- an inverter 30 provided with a pair of input terminals 30a and 30b connected to the power supply 20 and three output terminals 30u, 30v and 30w for outputting three-phase alternating current, and an output terminal 30u of the inverter 30.
- 30v, 30w provides a common mode filter circuit 10 connected to and from a three-phase AC motor 40 to which a three-phase AC is supplied.
- the common mode filter circuit 10 is connected to three common mode transformers 61, 62, 63 that cancel the common mode voltage of three-phase alternating current, and to the common mode transformers 61, 62, 63 and the input terminals 30a, 30b of the inverter 30, respectively. It is equipped with three pairs of capacitors 71, 72, 73, 74, 75, 76.
- One ends 61a, 62a, 63a of the primary windings 61t, 62t, 63t of the three common mode transformers 61, 62, 63, respectively, are connected to each of the three output terminals 30u, 30v, 30w of the inverter 30.
- the other ends 61b, 62b, 63b of the primary windings 61t, 62t, 63t of the three common mode transformers 61, 62, 63, respectively, have one end 71a to one input terminal 30a of the pair of input terminals 30a, 30b of the inverter 30.
- 73a, 75a are connected to each of the three pairs of capacitors 71, 72, 73, 74, 75, 76, each of which is a pair of capacitors 71, 72, capacitors 73, 74 and capacitors 75, 76.
- 75 is connected to the other end 71b, 73b, 75b.
- the other ends 61b, 62b, 63b of the primary windings 61t, 62t, 63t of the three common mode transformers 61, 62, 63, respectively, are connected to the other input terminal 30b of the pair of input terminals 30a, 30b of the inverter 30.
- the common mode voltage is detected in the primary windings 61t, 62t, 63t of the three common mode transformers 61, 62, 63.
- Each of the three-phase secondary windings 61u, 61v, 61w, 62u, 62v, 62w, 63u, 63v, 63w of the three common mode transformers 61, 62, 63 are connected in series with each other.
- the primary windings 61t, 62t, 63t are for each phase, and the secondary windings 61u, 61v, 61w, 62u, 62v, 62w, 63u, 63v, 63w.
- the three phases are the same, and the ratio of the number of turns of the primary winding 61t, 62t, 63t to the number of turns of the secondary winding 61u, 61v, 61w, 62u, 62v, 62w, 63u, 63v, 63w is 3: Since it is 1, the common mode voltage is appropriately offset from the voltage of each phase. As a result, the common mode voltage can be reduced.
- the common mode voltage of each phase at the output terminals 30u, 30v, 30w of the inverter 30 is v u , v v , v w
- the common mode voltage of each phase filtered by the common mode filter circuit 10 is v u ', v v .
- ⁇ , v w ⁇ the common mode voltages v u , v of each phase are used in each of the three common mode transformers 61, 62, 63 as shown in the following equation (1).
- v and v w are subtracted by 1/3.
- v u ' v u- (1/3), v u- (1/3), v v- (1/3), v w (1)
- the common mode filter circuit 10 of the present embodiment when there is no filter, a remarkable common mode voltage is generated. As shown in FIG. 3B, even when the common mode choke is installed, the high frequency component is slightly attenuated. On the other hand, as shown in FIG. 3C, in the common mode filter circuit 10 of the present embodiment, the common mode voltage appears to be almost 0 at the scale of the same voltage axis as in the case without the filter of FIG. 3A. It is attenuated to some extent. As shown in FIG. 3 (D), in the common mode filter circuit 10 of the present embodiment, the scale of the voltage axis is set to 20 times the scale of the case without the filter of FIG. 3 (A), and the common mode voltage can be confirmed.
- the ratio of the number of turns on the primary side to the number of turns on the secondary side is 3: 1, so that the thick secondary windings 61u, 61v, 61w, 62u, 62v, 62w, 63u, 63v , 63w can be reduced in number of turns. Since the current flowing through the primary windings 61t, 62t, 63t is small, the primary windings 61t, 62t, 63t can be made thin, and even if the number of turns is large, they do not occupy a large space. Therefore, the common mode transformers 61, 62, 63 can be significantly reduced in size. That is, in the present embodiment, it is possible to cope with the large current inverter 30 while ensuring the excitation inductance of the common mode transformers 61, 62, 63.
- the number of turns of the primary windings 61t, 62t, 63t of each of the three common mode transformers 61, 62, 63 is 3, and two of the three common mode transformers 61, 62, 63, respectively. Since the number of turns of the secondary windings 61u, 61v, 61w, 62u, 62v, 62w, 63u, 63v, 63w is 1, the thick secondary windings 61u, 61v, 61w, 62u, 62v, 62w, 63u, 63v, The number of turns of 63w can be minimized.
- the primary windings 61t, 62t, 63t can be made thin. Further, since the number of turns of the primary windings 61t, 62t, and 63t is 3, it occupies only a small space. Therefore, the common mode transformers 61, 62, 63 can be significantly reduced in size.
- the primary windings 61t, 62t, 63t can be made thin. Since the primary windings 61t, 62t, 63t are wound three times by passing through the inner 65i and the outer 65o of the annular iron core 65 of the common mode transformers 61, 62, 63, they occupy only a small space.
- the secondary windings 61u, 61v, 61w, 62u, 62v, 62w, 63u, 63v, 63w of the three common mode transformers 61, 62, 63, respectively are the secondary windings 61u, 62, 63 of the three common mode transformers 61, 62, 63, respectively. Since it is wound once by passing through the inner side 65i of the annular iron core 65 only once, the space factor of the secondary windings 61u, 61v, 61w, 62u, 62v, 62w, 63u, 63v, 63w can be obtained. Easy to raise and miniaturize. Therefore, the common mode transformers 61, 62, 63 can be significantly reduced in size.
- the embodiment is not limited to the above embodiment.
- the annular iron core 65 surrounding the secondary windings 61u, 61v, 61w, 62u, 62v, 62w, 63u, 63v, 63w is disclosed completely continuously.
- the annular iron core 65 is divided at any part and discontinuously secondary windings 61u, 61v, 61w, 62u, 62v, 62w, 63u, Those surrounding 63v and 63w are also included.
- the common mode voltage can be reduced.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
Description
vu´=vu-(1/3)・vu-(1/3)・vv-(1/3)・vw (1)
vu´=vu-(1/3)・vu-(1/3)・vv-(1/3)・vw=vu-vcm (2)
20 電源
30 インバータ
30a,30b 入力端子
30u,30v,30w 出力端子
40 三相交流電動機
50 モータケーブル
61,62,63 コモンモードトランス
61t,62t,63t 一次巻線
61u,61v,61w,62u,62v,62w,63u,63v,63w 二次巻線
61a,62a,63a 一端
61b,62b,63b 他端
64ua,64va,64wa 一端
64ub,64vb,64wb 他端
65 鉄心
65i 内側
65o 外側
71,72,73,74,75,76 キャパシタ
71a,72a,73a,74a,75a,76a 一端
71b,72b,73b,74b,75b,76b 他端
Claims (3)
- 電源に接続された一対の入力端子と三相交流を出力する3つの出力端子とを備えたインバータと、前記インバータの前記出力端子から前記三相交流を供給される三相交流電動機との間に接続されるコモンモードフィルタ回路であって、
前記三相交流のコモンモード電圧を相殺する3つのコモンモードトランスと、
前記コモンモードトランスと前記インバータの前記入力端子とにそれぞれ接続された三対のキャパシタと、
を備え、
3つの前記コモンモードトランスのそれぞれの一次巻線の一端は、前記インバータの3つの前記出力端子のそれぞれに接続され、
3つの前記コモンモードトランスのそれぞれの前記一次巻線の他端は、前記インバータの一対の前記入力端子の一方に一端が接続された三対の前記キャパシタの内のそれぞれ一対の前記キャパシタの一方の他端と、前記インバータの一対の前記入力端子の他方に一端が接続された三対の前記キャパシタの内のそれぞれ一対の前記キャパシタの他方の他端とに接続され、
3つの前記コモンモードトランスの三相の二次巻線のそれぞれは、互いに直列に接続され、
互いに直列に接続された3つの前記コモンモードトランスの三相の前記二次巻線のそれぞれの一端は、前記インバータの3つの前記出力端子のそれぞれに接続され、
互いに直列に接続された3つの前記コモンモードトランスの三相の前記二次巻線のそれぞれの他端は、前記三相交流電動機に接続され、
3つの前記コモンモードトランスのそれぞれの前記一次巻線の巻き数と前記二次巻線の巻き数との比は、3:1である、コモンモードフィルタ回路。 - 3つの前記コモンモードトランスのそれぞれの前記一次巻線の巻き数は3であり、3つの前記コモンモードトランスのそれぞれの前記二次巻線の巻き数は1である、請求項1に記載のコモンモードフィルタ回路。
- 3つの前記コモンモードトランスのそれぞれの前記一次巻線は、前記コモンモードトランスの環状の鉄心の内側及び外側を通過することにより3回巻かれ、
3つの前記コモンモードトランスのそれぞれの前記二次巻線は、3つの前記コモンモードトランスのそれぞれの環状の前記鉄心の前記内側を1回だけ通過することにより1回巻かれている、請求項2に記載のコモンモードフィルタ回路。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP21900600.4A EP4239870A1 (en) | 2020-12-02 | 2021-11-30 | Common mode filter circuit |
CN202180080363.9A CN116529999A (zh) | 2020-12-02 | 2021-11-30 | 共模滤波电路 |
JP2022566940A JPWO2022118847A1 (ja) | 2020-12-02 | 2021-11-30 | |
US18/326,081 US20230308069A1 (en) | 2020-12-02 | 2023-05-31 | Common mode filter circuit and drive device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020-200183 | 2020-12-02 | ||
JP2020200183 | 2020-12-02 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US18/326,081 Continuation US20230308069A1 (en) | 2020-12-02 | 2023-05-31 | Common mode filter circuit and drive device |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022118847A1 true WO2022118847A1 (ja) | 2022-06-09 |
Family
ID=81853303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2021/043898 WO2022118847A1 (ja) | 2020-12-02 | 2021-11-30 | コモンモードフィルタ回路 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20230308069A1 (ja) |
EP (1) | EP4239870A1 (ja) |
JP (1) | JPWO2022118847A1 (ja) |
CN (1) | CN116529999A (ja) |
WO (1) | WO2022118847A1 (ja) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11299264A (ja) * | 1998-04-06 | 1999-10-29 | System Giken:Kk | インバータのコモンモード電圧の抑制方法とその装置 |
JP2001231268A (ja) * | 2000-02-14 | 2001-08-24 | Hitachi Ltd | 電力変換装置 |
JP2001268922A (ja) * | 2000-03-15 | 2001-09-28 | Yaskawa Electric Corp | 電力変換装置 |
JP2010041908A (ja) * | 2008-07-08 | 2010-02-18 | Calsonic Kansei Corp | モータ駆動装置 |
JP2019115223A (ja) | 2017-12-26 | 2019-07-11 | 公益財団法人鉄道総合技術研究所 | 電気車用電力変換装置 |
-
2021
- 2021-11-30 WO PCT/JP2021/043898 patent/WO2022118847A1/ja active Application Filing
- 2021-11-30 EP EP21900600.4A patent/EP4239870A1/en active Pending
- 2021-11-30 JP JP2022566940A patent/JPWO2022118847A1/ja active Pending
- 2021-11-30 CN CN202180080363.9A patent/CN116529999A/zh active Pending
-
2023
- 2023-05-31 US US18/326,081 patent/US20230308069A1/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11299264A (ja) * | 1998-04-06 | 1999-10-29 | System Giken:Kk | インバータのコモンモード電圧の抑制方法とその装置 |
JP2001231268A (ja) * | 2000-02-14 | 2001-08-24 | Hitachi Ltd | 電力変換装置 |
JP2001268922A (ja) * | 2000-03-15 | 2001-09-28 | Yaskawa Electric Corp | 電力変換装置 |
JP2010041908A (ja) * | 2008-07-08 | 2010-02-18 | Calsonic Kansei Corp | モータ駆動装置 |
JP2019115223A (ja) | 2017-12-26 | 2019-07-11 | 公益財団法人鉄道総合技術研究所 | 電気車用電力変換装置 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2022118847A1 (ja) | 2022-06-09 |
CN116529999A (zh) | 2023-08-01 |
EP4239870A1 (en) | 2023-09-06 |
US20230308069A1 (en) | 2023-09-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6617814B1 (en) | Integrated DC link choke and method for suppressing common-mode voltage in a motor drive | |
US7132812B1 (en) | Integrated DC link choke and method for suppressing common-mode voltage in a motor drive | |
Chen et al. | A novel inverter-output passive filter for reducing both differential-and common-mode $ dv/dt $ at the motor terminals in PWM drive systems | |
JP4260110B2 (ja) | フィルタ装置 | |
EP2775488A1 (en) | Reactor, transformer, and power conversion apparatus using same | |
JP3596694B2 (ja) | Pwmインバータ用フィルタ回路 | |
EP2448100A2 (en) | Multi-Phase Power Converters and Integrated Choke Therefor | |
TWI390560B (zh) | 變壓裝置 | |
AU2005290576A1 (en) | Power converter | |
JP4626389B2 (ja) | 複合リアクトル | |
US6987372B1 (en) | Integrated DC link choke and method for suppressing common-mode voltage in a motor drive | |
JP2009135271A (ja) | リアクトルおよびノイズフィルタ | |
CN112820513A (zh) | 电感器组件 | |
KR20140081870A (ko) | 유도장치와 그 용도 | |
JP2001268922A (ja) | 電力変換装置 | |
JP2020103029A (ja) | コモンモード減衰を呈する三相ディファレンシャルモードリアクトルを含むフィルタを有するモータードライブ | |
WO2022118847A1 (ja) | コモンモードフィルタ回路 | |
WO2021152888A1 (ja) | ノイズフィルタ、ノイズフィルタ装置、および電力変換装置 | |
WO2021250728A1 (ja) | ノイズフィルタ及びそれを用いた電力変換装置 | |
JPH0541121U (ja) | ノイズ防止チヨークコイル | |
JP6173842B2 (ja) | 回転電機 | |
JPH0722996Y2 (ja) | 雑音発生防止装置 | |
Zhao et al. | Optimized Filter Design for Common-Mode Current Reduction in Four-Wire Inverter-Fed Motors | |
US11114932B1 (en) | Method and apparatus for reduction of ripple current | |
US20230326646A1 (en) | Common mode choke for connecting to dc side of power converter, filter arrangement, and power converter |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21900600 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202180080363.9 Country of ref document: CN |
|
ENP | Entry into the national phase |
Ref document number: 2022566940 Country of ref document: JP Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 2021900600 Country of ref document: EP Effective date: 20230602 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |